Information

english
german

Ecological parameter: swimming factor

Parameter group: life & body related parameters

Explanation:
The swimming factor is defined as the ratio of the minimum depth of the caudal peduncle to the maximum caudal fin depth. A small ratio indicates a strong swimming capability (thunniform fishes). Three categories are defined.

Poff, N.L.,and J.D. Allan. 1995. Functional organization of stream fish assemblages in relation to hydrologic variability. Ecology 76:606-627.


Classification system: single category assignment system
A description of the coding system can be found here  Abbreviations/Coding Systems

Abbreviations:
Category name:Abbreviations:Explanation:
< = 0.38sw1ratio is less than or equal 0.38 (swimming factor 1)
0.38 - 0.43sw2ratio is between 0.38 and 0.43 (swimming factor 2)
> 0.43sw3ratio is more than 0.43 (swimming factor 3)
Assigned taxa for each higher systematic unit:
TaxagroupNumber of assigned taxa / total number of taxa - percentage
Acipenseriformes3 / 13 - 23%
Anguilliformes1 / 1 - 100%
Atheriniformes2 / 4 - 50%
Clupeiformes2 / 18 - 11.1%
Cypriniformes35 / 313 - 11.1%
Cyprinodontiformes2 / 12 - 16.6%
Esociformes2 / 3 - 66.6%
Gasterosteiformes2 / 9 - 22.2%
Perciformes16 / 94 - 17%
Petromyzontiformes3 / 13 - 23%
Pleuronectiformes2 / 3 - 66.6%
Salmoniformes11 / 125 - 8.7%
Scorpaeniformes1 / 16 - 6.2%
Siluriformes4 / 7 - 57.1%